FR2321751A1 - MATERIALS OF HIGH ELECTRICAL RESISTANCE AT HIGH TEMPS. - comprise crystalline thermoplastic (co)polymer and conducting filler used for heating elements - Google Patents

MATERIALS OF HIGH ELECTRICAL RESISTANCE AT HIGH TEMPS. - comprise crystalline thermoplastic (co)polymer and conducting filler used for heating elements

Info

Publication number
FR2321751A1
FR2321751A1 FR7623707A FR7623707A FR2321751A1 FR 2321751 A1 FR2321751 A1 FR 2321751A1 FR 7623707 A FR7623707 A FR 7623707A FR 7623707 A FR7623707 A FR 7623707A FR 2321751 A1 FR2321751 A1 FR 2321751A1
Authority
FR
France
Prior art keywords
polymer
temp
conducting filler
pref
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7623707A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raychem Corp
Original Assignee
Raychem Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raychem Corp filed Critical Raychem Corp
Publication of FR2321751A1 publication Critical patent/FR2321751A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/027—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Thermistors And Varistors (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Resistance Heating (AREA)
  • Conductive Materials (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

PTC materials (having a positive temp coefft. of electrical resistance) comprise a crystalline thermoplastic polymer having a gel fraction of 0.60-0.885 and a finely divided electrically conducting filler. Used for prepn. of strip heating elements which automatically switch off at a predetermined "switching temp", Ts. It has been found that the specific resistance of cross linked polymeric PTC materials on heating above peak temp remains constant only over a small temp increase. The resistance falls considerably on further heating and results in high energy prodn. from the electrical power source and runaway heating which can have disastrous consequences. This problem is avoided by crosslinking in such a way that the gel fraction of the polymer remains within the range claimed. The polymer used should have at least 10% and pref. 20% crystallinity as determined by X-ray diffraction. Pref. polymers are (co)polymers of C2H4, propylene, butene-1 and hexene-1 or copolymers of C2H4 with methacrylic acid, ethyl acetate, vinyl acetate or fluoride, polyoxy-methylene, ethylene or -propylene; polyvinylidene fluoride; polyphenylenesulphide, polymethacrylonitrile; polycarbonates, and polyimides. The conducting filler is pref. C black, but finely divided metals can also be used.
FR7623707A 1975-08-04 1976-08-03 MATERIALS OF HIGH ELECTRICAL RESISTANCE AT HIGH TEMPS. - comprise crystalline thermoplastic (co)polymer and conducting filler used for heating elements Withdrawn FR2321751A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60142475A 1975-08-04 1975-08-04

Publications (1)

Publication Number Publication Date
FR2321751A1 true FR2321751A1 (en) 1977-03-18

Family

ID=24407437

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7623707A Withdrawn FR2321751A1 (en) 1975-08-04 1976-08-03 MATERIALS OF HIGH ELECTRICAL RESISTANCE AT HIGH TEMPS. - comprise crystalline thermoplastic (co)polymer and conducting filler used for heating elements

Country Status (3)

Country Link
JP (1) JPS5244860A (en)
DE (1) DE2634999A1 (en)
FR (1) FR2321751A1 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368127A1 (en) * 1976-10-15 1978-05-12 Raychem Corp COMPOSITIONS WITH A POSITIVE TEMPERATURE COEFFICIENT AND DEVICES INCLUDING
FR2374357A1 (en) * 1976-12-16 1978-07-13 Raychem Corp CONDUCTIVE POLYMERIC COMPOSITIONS AND DEVICES INCLUDING
FR2391247A1 (en) * 1977-05-18 1978-12-15 Raychem Corp COMPOSITION OF ELECTRICALLY CONDUCTIVE POLYMERS FOR USE IN HEATING ELEMENTS
FR2423037A2 (en) * 1978-04-14 1979-11-09 Raychem Corp COMPOSITIONS WITH A POSITIVE TEMPERATURE COEFFICIENT AND DEVICES INCLUDING
FR2443123A1 (en) * 1978-12-01 1980-06-27 Raychem Corp LOW RESISTIVITY COMPOSITION AND DEVICE CONTAINING THE SAME
FR2452768A1 (en) * 1979-03-26 1980-10-24 Eb Ind Inc ELECTRICALLY CONDUCTIVE COMPOSITION AND METHOD OF USING SAME FOR MANUFACTURING OBJECTS
EP0040537A2 (en) * 1980-05-19 1981-11-25 RAYCHEM CORPORATION (a California corporation) PTC conductive polymer compositions and devices comprising them and a method of making them
EP0063440A2 (en) * 1981-04-02 1982-10-27 RAYCHEM CORPORATION (a Delaware corporation) Radiation cross-linking of PTC conductive polymers
US4388607A (en) 1976-12-16 1983-06-14 Raychem Corporation Conductive polymer compositions, and to devices comprising such compositions
US4426633A (en) 1981-04-15 1984-01-17 Raychem Corporation Devices containing PTC conductive polymer compositions
US4591700A (en) * 1980-05-19 1986-05-27 Raychem Corporation PTC compositions
US4845838A (en) * 1981-04-02 1989-07-11 Raychem Corporation Method of making a PTC conductive polymer electrical device
US4907340A (en) * 1987-09-30 1990-03-13 Raychem Corporation Electrical device comprising conductive polymers
US4924074A (en) * 1987-09-30 1990-05-08 Raychem Corporation Electrical device comprising conductive polymers
US4951382A (en) * 1981-04-02 1990-08-28 Raychem Corporation Method of making a PTC conductive polymer electrical device
US4951384A (en) * 1981-04-02 1990-08-28 Raychem Corporation Method of making a PTC conductive polymer electrical device
US4955267A (en) * 1981-04-02 1990-09-11 Raychem Corporation Method of making a PTC conductive polymer electrical device
US5140297A (en) * 1981-04-02 1992-08-18 Raychem Corporation PTC conductive polymer compositions
US5166658A (en) * 1987-09-30 1992-11-24 Raychem Corporation Electrical device comprising conductive polymers
US5195013A (en) * 1981-04-02 1993-03-16 Raychem Corporation PTC conductive polymer compositions
US5227946A (en) * 1981-04-02 1993-07-13 Raychem Corporation Electrical device comprising a PTC conductive polymer

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200973A (en) * 1978-08-10 1980-05-06 Samuel Moore And Company Method of making self-temperature regulating electrical heating cable
JPS5716424A (en) * 1980-07-02 1982-01-27 Seiko Epson Corp Electrochromic display body
JPS5853932A (en) * 1981-09-28 1983-03-30 Tokyo Ink Kk Electrically conductive and heat-weldable resin composition for plastic and metal
US4459473A (en) * 1982-05-21 1984-07-10 Raychem Corporation Self-regulating heaters
JPS6080201A (en) * 1983-10-11 1985-05-08 出光興産株式会社 Method of producing heat sensitive resistive conductive material
JPS61118455A (en) * 1984-11-14 1986-06-05 Central Glass Co Ltd Electrically conductive resin composition
JPS61181859A (en) * 1985-02-06 1986-08-14 Mitsubishi Petrochem Co Ltd Electrically conductive polymer composition having positive temperature coefficient characteristic
JPH0638362B2 (en) * 1986-05-29 1994-05-18 出光興産株式会社 Method for producing polymer positive temperature coefficient resistor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563916A (en) * 1967-08-23 1971-02-16 Japan Gas Chemical Co Carbon black-synthetic resins electro-conductive composition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563916A (en) * 1967-08-23 1971-02-16 Japan Gas Chemical Co Carbon black-synthetic resins electro-conductive composition

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368127A1 (en) * 1976-10-15 1978-05-12 Raychem Corp COMPOSITIONS WITH A POSITIVE TEMPERATURE COEFFICIENT AND DEVICES INCLUDING
US4388607A (en) 1976-12-16 1983-06-14 Raychem Corporation Conductive polymer compositions, and to devices comprising such compositions
FR2374357A1 (en) * 1976-12-16 1978-07-13 Raychem Corp CONDUCTIVE POLYMERIC COMPOSITIONS AND DEVICES INCLUDING
FR2391247A1 (en) * 1977-05-18 1978-12-15 Raychem Corp COMPOSITION OF ELECTRICALLY CONDUCTIVE POLYMERS FOR USE IN HEATING ELEMENTS
FR2423037A2 (en) * 1978-04-14 1979-11-09 Raychem Corp COMPOSITIONS WITH A POSITIVE TEMPERATURE COEFFICIENT AND DEVICES INCLUDING
FR2443123A1 (en) * 1978-12-01 1980-06-27 Raychem Corp LOW RESISTIVITY COMPOSITION AND DEVICE CONTAINING THE SAME
FR2452768A1 (en) * 1979-03-26 1980-10-24 Eb Ind Inc ELECTRICALLY CONDUCTIVE COMPOSITION AND METHOD OF USING SAME FOR MANUFACTURING OBJECTS
US4591700A (en) * 1980-05-19 1986-05-27 Raychem Corporation PTC compositions
EP0040537A2 (en) * 1980-05-19 1981-11-25 RAYCHEM CORPORATION (a California corporation) PTC conductive polymer compositions and devices comprising them and a method of making them
EP0040537A3 (en) * 1980-05-19 1982-12-01 Raychem Corporation Ptc conductive polymer compositions and devices comprising them and a method of making them
US4955267A (en) * 1981-04-02 1990-09-11 Raychem Corporation Method of making a PTC conductive polymer electrical device
EP0063440A3 (en) * 1981-04-02 1983-04-13 Raychem Corporation Radiation cross-linking of ptc conductive polymers
EP0063440A2 (en) * 1981-04-02 1982-10-27 RAYCHEM CORPORATION (a Delaware corporation) Radiation cross-linking of PTC conductive polymers
EP0311142A2 (en) * 1981-04-02 1989-04-12 Raychem Corporation Radiation cross-linking of ptc conductive polymers
EP0311142A3 (en) * 1981-04-02 1989-04-26 Raychem Corporation Radiation cross-linking of ptc conductive polymers
US4845838A (en) * 1981-04-02 1989-07-11 Raychem Corporation Method of making a PTC conductive polymer electrical device
US5227946A (en) * 1981-04-02 1993-07-13 Raychem Corporation Electrical device comprising a PTC conductive polymer
US5195013A (en) * 1981-04-02 1993-03-16 Raychem Corporation PTC conductive polymer compositions
US4951382A (en) * 1981-04-02 1990-08-28 Raychem Corporation Method of making a PTC conductive polymer electrical device
US4951384A (en) * 1981-04-02 1990-08-28 Raychem Corporation Method of making a PTC conductive polymer electrical device
US5140297A (en) * 1981-04-02 1992-08-18 Raychem Corporation PTC conductive polymer compositions
US4426633A (en) 1981-04-15 1984-01-17 Raychem Corporation Devices containing PTC conductive polymer compositions
US5166658A (en) * 1987-09-30 1992-11-24 Raychem Corporation Electrical device comprising conductive polymers
US4924074A (en) * 1987-09-30 1990-05-08 Raychem Corporation Electrical device comprising conductive polymers
US4907340A (en) * 1987-09-30 1990-03-13 Raychem Corporation Electrical device comprising conductive polymers

Also Published As

Publication number Publication date
JPS5244860A (en) 1977-04-08
DE2634999A1 (en) 1977-02-10

Similar Documents

Publication Publication Date Title
FR2321751A1 (en) MATERIALS OF HIGH ELECTRICAL RESISTANCE AT HIGH TEMPS. - comprise crystalline thermoplastic (co)polymer and conducting filler used for heating elements
US4560498A (en) Positive temperature coefficient of resistance compositions
GB1453147A (en) Resistivity variance reduction
US6221282B1 (en) Electrical devices comprising conductive polymer compositions
US4658121A (en) Self regulating heating device employing positive temperature coefficient of resistance compositions
US4426633A (en) Devices containing PTC conductive polymer compositions
CA1082447A (en) Voltage stable compositions
US5140297A (en) PTC conductive polymer compositions
US3858144A (en) Voltage stress-resistant conductive articles
EP0311142B1 (en) Radiation cross-linking of ptc conductive polymers
EP0198598A3 (en) Process for the preparation of a ptc element by cross-linking conductive polymer compositions, and electrical devices using the product therefrom
JPS60155268A (en) Electroconductive polymer composition
GB1562085A (en) Electrical heater and proxesses using it
JPH05345860A (en) Electrically conductive polymer composition and electrical apparatus
GB1499842A (en) Welded polymeric articles and process
ES441299A1 (en) Electrically conductive compositions and heat-recoverable articles containing them
EP0417204A1 (en) Polymeric ptc composition and electrical device thereof.
US3614584A (en) Termination of battery charging
GB1058130A (en) Cross-linking sulphonated aryl polymers
EP0138424A2 (en) Electrical devices comprising conductive polymers exhibiting ptc characteristics
JP2631117B2 (en) Manufacturing method of heating element with positive temperature characteristic
JPS58164187A (en) Self-temperature controllable heater
GB2033707A (en) Conductive polymer compositions of an electrical device
US3133894A (en) Polyethylene resin insulating material
JPH0294281A (en) Plane-shaped heating element for melting snow on roof

Legal Events

Date Code Title Description
ST Notification of lapse